package thread;

public class SyncDemo3 {
    public static void main(String[] args) {
        //StringBuilder sb = new StringBuilder();
        StringBuffer sb = new StringBuffer();

        Thread t1=new Thread(){
          public void run(){
              for (int i=0;i<1000;i++){
                  sb.append("abc");
              }
          }
        };
        Thread t2 =new Thread(){
            public void run(){
                for (int i =0;i<1000;i++){
                    sb.append("efg");
                }
            }
        };
        t1.start();
        t2.start();
        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {
        }
        System.out.println(sb.length());
        System.out.println(sb);
    }
}
